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Aug 24th, 2023
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Joined: Feb 2012
Posts: 7
New to Talk Morgan
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OP
New to Talk Morgan
Joined: Feb 2012
Posts: 7 |
Greetings,
I am new to the forum, so feeling my way a bit.
I have a problem with my 2004 Plus 8 that I am hoping someone will be able to assist with.
The first occasion, the fan kept running and running until I disconnected. Without thinking too much assumed it was the thermostat switch in the radiator and replaced. On reconnection, the fan immediately restarted. (Engine dead cold). With a bit more thinking this time, replaced the relay. Problem fixed - but only temporarily. Problem reoccurred. Tried a new relay. Problem fixed - but only temporarily.
Latest occasion, took out the relay and replaced with one of my early rejects - fan stopped. Took out that relay and replaced with the first - fan restarted. That relay was quite warm - a bit more than I would expect from just being in the engine bay.
All the relays are 30 amp which I would think should be ample.
Any ideas?
KiwiNeil
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Joined: Jan 2012
Posts: 4,328
Gone to Porsche Part of the Furniture
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Gone to Porsche Part of the Furniture
Joined: Jan 2012
Posts: 4,328 |
Reach up to the sun and turn it down a bit, it is far to hot in New Zealand 
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Joined: Jul 2007
Posts: 28,413 Likes: 177
Salty Sea Dog Member of the Inner Circle
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Salty Sea Dog Member of the Inner Circle
Joined: Jul 2007
Posts: 28,413 Likes: 177 |
Cheap/poor quality relays from the sounds of it. A not unknown problem today... Welcome to TalkMorgan 
Graham (G4FUJ)
Sold L44FOR 4/4 Giallo Fly
'09 Gen2 MINI Cooper ragtop
'90 LR 90 SW
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Joined: Oct 2008
Posts: 24
New to Talk Morgan
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New to Talk Morgan
Joined: Oct 2008
Posts: 24 |
Had a similar thing happen to me in 2002 +8 it was the relay that is on the drivers side bulhead {on rhd cars] just above the steering column.
johnb
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Joined: Jun 2007
Posts: 859 Likes: 1
Talk Morgan Regular
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Talk Morgan Regular
Joined: Jun 2007
Posts: 859 Likes: 1 |
If the relay is warm, I would check the contacts on the base to ensure that there is not a high resistance contact. Removing the relay and replacing, may temporarily solve the problem but as the fan draws quite a heavy current, then the problem will come back. I would also check the stat to make sure that it is operating correctly.
Neil
Honda S2000
Lexus UX 250h
Toyota Auris Hybrid
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Joined: Nov 2010
Posts: 167
L - Learner Plates On
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L - Learner Plates On
Joined: Nov 2010
Posts: 167 |
The electric fan may be worn out. They begin to draw too much current sometimes when they wear and that could cause the relay points to fuse.
'65 +4 four seater
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Joined: Dec 2008
Posts: 143 Likes: 1
L - Learner Plates On
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L - Learner Plates On
Joined: Dec 2008
Posts: 143 Likes: 1 |
My guess is that you have a seperate switch fitted so that you can start cooling before the rad temp unit kicks in.
Most +8s are fitted with one after market because most +8 owners get paranoid about temperature.
Radiator is too small so too hot in summer traffic jams.
change rad for aluminium and its too cold in winter.
The switch is often mounted behind dash ,maybe pull down knob.
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Joined: Feb 2012
Posts: 7
New to Talk Morgan
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OP
New to Talk Morgan
Joined: Feb 2012
Posts: 7 |
The summer in NZ hasn't been brilliant, so more likely a need to turn up the sun a bit.
N
2004 Plus 8
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Joined: Feb 2012
Posts: 7
New to Talk Morgan
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OP
New to Talk Morgan
Joined: Feb 2012
Posts: 7 |
The original relay was Bosch, should have been an OK quality.
Replaced with relays from the local auto supply store. Quality of those could be more suspect.
But the same problem with all 3 relays?
N
2004 Plus 8
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Joined: Feb 2012
Posts: 7
New to Talk Morgan
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OP
New to Talk Morgan
Joined: Feb 2012
Posts: 7 |
If only it were that easy!
Now on the third relay!
N
2004 Plus 8
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